<template>
  <div class="app-container">

    <!-- 搜索表单 -->
    <el-form ref="queryRef" :inline="true" :model="queryParams" v-show="showSearch" label-width="68px">
      <el-form-item label="品牌名称" prop="name">
        <el-input
            placeholder="请输入品牌名称"
            clearable
            v-model="queryParams.name"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="Search" @click="handleQuery">搜索</el-button>
        <el-button icon="Refresh" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <!-- 功能按钮栏 -->
    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
            type="primary"
            plain
            icon="Plus"
            @click="handleAdd"
        >新增
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="success"
            plain
            icon="Edit"
            @click="handleUpdate"
            :disabled="single"
        >修改
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
            type="danger"
            plain
            icon="Delete"
            @click="handleDelete"
            :disabled="multiple"
        >删除
        </el-button>
      </el-col>
      <right-toolbar v-model:show-search="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <!-- 数据展示表格  -->
    <el-table v-loading="loading" :data="brandList" @selection-change="handleException">
      <el-table-column type="selection" width="55" align="center"/>
      <el-table-column label="品牌名称" prop="name" width="200"/>
      <el-table-column label="品牌图标" prop="logo" #default="scope">
        <img :src="scope.row.logo" width="50"/>
      </el-table-column>
      <el-table-column prop="createTime" label="创建时间"/>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template #default="scope">
          <el-button link type="primary" icon="Edit" @click="handleUpdate(scope.row)">修改</el-button>
          <el-button link type="primary" icon="Delete" @click="handleDelete(scope.row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 新增或修改分类品牌对话框 -->
    <el-dialog :title="title" v-model="open" width="500px" append-to-body>
      <el-form ref="brandRef" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="品牌名称" prop="name">
          <el-input v-model="form.name" placeholder="请输入品牌名称"/>
        </el-form-item>
        <el-form-item label="品牌图标" prop="logo">
          <el-upload
              class="avatar-uploader"
              :action="imgUpload.url"
              :headers="imgUpload.headers"
              :show-file-list="false"
              :on-success="handleAvatarSuccess"
              :before-upload="beforeAvatarUpload"
          >
            <img v-if="form.logo" :src="form.logo" class="avatar"/>
            <el-icon v-else class="avatar-uploader-icon">
              <Plus/>
            </el-icon>
          </el-upload>
        </el-form-item>
      </el-form>
      <template #footer>
        <div class="dialog-footer">
          <el-button type="primary" @click="summit">确 定</el-button>
          <el-button @click="cancle">取 消</el-button>
        </div>
      </template>
    </el-dialog>

    <!-- 分页条组件 -->
    <pagination
        v-show="total > 0"
        :total="total"
        v-model:page="queryParams.pageNum"
        v-model:limit="queryParams.pageSize"
        @pagination="getList"
    />

  </div>
</template>

<script setup name="Brand">
//==================1.导入区域=====================
//导入API
import {listBrand, getBrandById, addBrand, updateBrand, removeBran} from '@/api/product/brand';
import {ElMessage, ElMessageBox} from "element-plus";
import {getToken} from "@/utils/auth.js";


//==================2.变量区域=====================

//获取当前组件实例
//proxy 是 Vue3 中的一个新特性，它允许我们在 setup 函数内部直接访问组件实例的属性和方法
const {proxy} = getCurrentInstance();

//加载数据效果
const loading = ref(false);

//定义列表总记录数模型
const total = ref();

//定义分页列表数据模型
const brandList = ref([]);

//动态式标题
const title = ref('');

//添加或修改对话框是否显示
const open = ref(false);

//定义多选控制模型
const multiple = ref(true);

//定义单选控制模型
const single = ref(true);

//多选数组
const ids = ref([])

//定义隐藏搜索控制模型
const showSearch = ref(true)

//Vue3中的两种响应式数据绑定方式：reactive 和 ref
//ref定义：基本数据类型，适用于简单的响应式数据
//reactive定义：对象或数组数据类型，适用于复杂对象或数组的响应式数据
const data = reactive({
  //定义搜索模型
  queryParams: {
    name: null,
    pageNum: 1,
    pageSize: 10
  },
  form: {
    id: null,
    name: null,
    logo: null
  },
  imgUpload: {
    //VITE_APP_BASE_API = '/dev-api',文件上传路径
    url: import.meta.env.VITE_APP_BASE_API + 'file/upload',
    headers: {
      //同步调用，不走ajax请求，手动挂载token
      Authorization: 'Bearer ' + getToken()
    }
  },
  rules: {
    name: [{required: true, message: "品牌名称不能为空", trigger: "blur"}],
    logo: [{required: true, message: "品牌图标不能为空", trigger: "blur"}]
  }
})

//使用Vue.js的Composition API 中的 toRefs 函数将 data 对象的属性转换为响应式应用。
// queryParams是一个响应式应用，它指向data对象中的queryParams属性。
// 这样，当queryParams的值发生变化时，任何依赖于它的组件都将自动更新
const {queryParams, form, imgUpload, rules} = toRefs(data) //将reactive声明的多个参数，转换为单个ref变量


//==================3.事件处理区域==================

//查询分页
function getList() {
  loading.value = true
  listBrand(queryParams.value).then((result) => {
    loading.value = false
    brandList.value = result.rows
    total.value = result.total
  })
}

//条件查询
function handleQuery() {
  getList();
}

//查询重置
/*function resetQuery() {
  queryParams.value = {
    name: null
  }
  getList()
}*/
//优化版本的查询重置
function resetQuery() {
  proxy.resetForm('queryRef')
  getList()
}

//添加功能
function handleAdd() {
  reset()
  open.value = true
  title.value = '添加品牌'
}

//图片上传成功回调处理
function handleAvatarSuccess(result, upload) {
  form.value.logo = result.data.url
  //清楚上传成功后的提示
  proxy.$refs['brandRef'].clearValidate('logo')
}

//图片上传的教研
const beforeAvatarUpload = (rawFile) => {
  if (rawFile.type !== 'image/jpeg'
      && rawFile.type !== 'image/png') {
    ElMessage.error('图片必须是jpeg或者png格式!')
    return false
  } else if (rawFile.size / 1024 / 1024 > 1) {
    ElMessage.error('图片不能大于1MB!')
    return false
  }
  return true
}

//添加或修改函数
function summit() {
  proxy.$refs["brandRef"].validate((valid) => {
    if (valid) {
      if (form.value.id) { //如果id == null 就是false，走下面的添加流程
        updateBrand(form.value).then((result) => {
          //ElMessage.success(result.msg)
          proxy.$modal.msgSuccess("修改成功")
          open.value = false
          getList()
        })
      } else {
        addBrand(form.value).then((result => {
          //ElMessage.success(result.msg)
          proxy.$modal.msgSuccess("新增成功")
          open.value = false
          getList()
        }))
      }
    } else {
      proxy.$modal.msgError("表单数据不合法！")
    }
  })

}

//取消函数
function cancle() {
  open.value = false
  reset()
}

//清除表单数据
/*function reset() {
  form.value = {
    id: null,
    name: null,
    logo: null
  }
}*/
//优化后的清楚表单数据
function reset() {
  proxy.resetForm('brandRef')
}

//修改函数
function handleUpdate(row) {
  open.value = true
  title.value = '修改品牌'
  let _id = row.id || ids.value
  getBrandById(_id).then((result) => {
    form.value = result.data
  })
}

/*//删除函数
function handleDelete(row) {
  let _id = row.id || ids.value
  //删除确认信息
  ElMessageBox.confirm('确定要删除数据吗？', '提示', {
    confirmButtonText: '确认',
    cancelButtonText: '取消',
    type: 'warning',
  }).then(() => { //确认操作
        removeBran(_id).then((result) => {
          ElMessage.success(result.msg)
          getList()
        })
      }
  ).catch(() => { //取消操作
    ElMessage.info("取消删除")
  })
}*/

//优化后的删除
function handleDelete(row) {
  let _id = row.id || ids.value
  proxy.$modal.confirm('确定要删除数据吗？').then(() => {
    return removeBran(_id)
  }).then(() => {
    getList()
    proxy.$modal.msgSuccess("删除成功")
  }).catch(() => {
    ElMessage.info("取消删除")
  })
}

//复选框事件
function handleException(selection) { //selection是一个数组，被勾选表体数据
  ids.value = selection.map(item => {
    return item.id
  })

  single.value = ids.value.length != 1
  multiple.value = ids.value.length == 0
}

//调取分页函数
getList();

//==================================================

</script>

<style scoped>
.avatar-uploader .avatar {
  width: 178px;
  height: 178px;
  display: block;
}
</style>

<style>
.avatar-uploader .el-upload {
  border: 1px dashed var(--el-border-color);
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--el-transition-duration-fast);
}

.avatar-uploader .el-upload:hover {
  border-color: var(--el-color-primary);
}

.el-icon.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  text-align: center;
}
</style>